No there isn't a better choice in the swords section. Only Phase Blades and Colossus Blades can spawn with 6 sockets and Phase Blades can never spawn ethereal whereas an ethereal weapon is a must for BotD to take advantage of 50%ED/indestructible.

Tnx... Sry didn't write in first post.. but is there a 1 hand weap that is better than an eth colossus?

Just a thought... If not going botd.. then howabout an etheral ''rune master'' with 5 socks and good %... then fill it up with 40ed/15 ias jwls ... would that work? (eth 4 dueling.. but ofc. a normal one wouldn't be as expensive..) ?